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Title: Neutrino quantum kinetic equations: The collision term

Journal Article · · Physical Review D
 [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We derive the collision term relevant for neutrino quantum kinetic equations in the early universe and compact astrophysical objects, displaying its full matrix structure in both flavor and spin degrees of freedom. We include in our analysis neutrino-neutrino processes, scattering and annihilation with electrons and positrons, and neutrino scattering off nucleons (the latter in the low-density limit). After presenting the general structure of the collision terms, we take two instructive limiting cases. The one-flavor limit highlights the structure in helicity space and allows for a straightforward interpretation of the off-diagonal entries in terms of the product of scattering amplitudes of the two helicity states. As a result, the isotropic limit is relevant for studies of the early universe: in this case the terms involving spin coherence vanish and the collision term can be expressed in terms of two-dimensional integrals, suitable for computational implementation.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1321763
Alternate ID(s):
OSTI ID: 1306703
Report Number(s):
LA-UR-15-25029; PRVDAQ
Journal Information:
Physical Review D, Vol. 94, Issue 3; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

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Cited By (5)

Collective neutrino oscillations with the halo effect in single-angle approximation journal November 2018
Thermalisation of sterile neutrinos in the early universe in the 3+1 scheme with full mixing matrix journal July 2019
On the Occurrence of Crossings between the Angular Distributions of Electron Neutrinos and Antineutrinos in the Supernova Core journal September 2019
Lepton asymmetry, neutrino spectral distortions, and big bang nucleosynthesis text January 2016
Neutrino Quantum Kinetics in Compact Objects text January 2019

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